Rust Under the Battery Tray

While removing the front sheet metal from the front of the Mustang, I found 16 small holes which needed to be filled and two small areas of rust.

One of those areas is under the battery tray. I've already purchased a replacement panel which I plan to cut a small section out of to just replace the rusted area. I do not want to replace the entire panel as it is more work and there is a VIN stamping at the top of the original panel I would like to keep.

Tonight, I cut out the old rusted section of the battery apron. It was my first attempt at this type metal work. The difficult part is cuting a replacement section from the new piece of metal without destroying the piece!